Restclient operation index library - initialize restclient

1. introduce es Of RestHighLevelClient rely on ：

<!--elasticsearch-->
<dependency>
     <groupId>org.elasticsearch.client</groupId>
     <artifactId>elasticsearch-rest-high-level-client</artifactId>
     <version>7.12.1</version>
</dependency>

2. because SpringBoot default ES The version is 7.6.2, So we need to override the default ES edition ： 

3. initialization RestHighLevelClient：

return new RestHighLevelClient(RestClient.builder(
                HttpHost.create("http://192.168.150.101:9200")
));